Visit every major Peroxian landmark (and report back to the tour guide!)

Collect all 9 trading cards on Peroxis and Muxxalon.

Defeat Mux.

Find a way to make love to the Parasite Passenger.

Become the Riddle Master.

Take a bath with Toxxo.

Discover Dr. Gurgula's hideout in the Human Haven.

Sit through the entirety of the really annoying countdown show on TV.

Sacrifice a Gatlian other than Kenny during the fight against Garmantuous.

Say goodbye to Suit-O.

Defeat Nipulon.

Pay your bill at Applebee's.

Defeat the Skrendel Brothers.